We prepared reference and flame-retarded carbon fibre reinforced composites both by liquid composite moulding, in particular vacuum infusion, and by hand lamination followed by hot pressing (wet compression moulding) in order to study the effect of carbon fibre reinforcement and particle distribution of solid flame retardants (FRs) on fire performance. The flame-retarded matrix had 3% total phosphorus (P) content from ammonium polyphosphate (APP). When the infusion site of the composite produced by vacuum infusion faced the conical heater during the mass loss type cone calorimeter tests, the peak of heat release rate (pHRR) was lower, the time of pHRR became longer and the intumescence increased in comparison to the laminated sample, which supported our hypothesis about the filtration of solid APP during the vacuum infusion process. In order to model the suspected filtration, we prepared a laminated composite sample with an increasing amount of APP equivalent to 1%, 2%, 3%, 4%, 5% P content in each subsequent layer.

The HRR curve of the composite produced by vacuum infusion with the infusion site facing the conical heater was basically identical with the curve of the model composite with the 5% P layer facing the conical heater in the early phase of the degradation, while in the main degradation phase, the lower burnable ratio of the composite prepared by vacuum infusion led to a further decrease in pHRR (184 kW/m²) and THR (15.5 MJ/m²), and the consequent best overall fire performance of the composite produced by vacuum infusion. The suspected accumulation of APP in the first layers of the composite caused by the carbon fibre reinforcement was proven by SEM-EDS elemental maps of the whole cross-section of the composite.

我们通过液体复合材料成型，特别是真空灌注，然后手工层压，然后热压（湿压缩成型），制备了参考和阻燃的碳纤维增强复合材料，以研究碳纤维增强和固体颗粒分布的效果。阻燃剂（FRs）的防火性能。阻燃基质的总磷（P）含量为多磷酸铵（APP）的3％。在质量损失型锥形量热仪测试中，当通过真空灌注生产的复合材料的灌注部位面对锥形加热器时，与之相比，放热速率（pHRR）的峰值更低，pHRR的时间变长，膨胀度增加。层压样品，这支持了我们关于真空灌注过程中固体APP过滤的假设。

在降解的早期阶段，通过真空注入将注入位置面向锥形加热器的复合材料的HRR曲线与具有5％P层面向锥形加热器的模型复合材料的曲线基本相同。在降解阶段，通过真空灌注制备的复合材料的较低可燃比导致pHRR（184 kW / m ²）和THR（15.5 MJ / m ²）进一步降低，并因此获得了最佳的整体防火性能。真空输液。碳纤维增强引起的复合材料第一层中APP的可疑堆积已通过复合材料整个横截面的SEM-EDS元素图得到了证明。